DE202005021883U1 - Composite disc with an integrated holding element - Google Patents

Abstract

Composite disc (1) with at least one rigid disc (2) and an adhesively bonded adhesive layer (3) adhesively bonded thereto, with which a protective film (4) is laminated onto the rigid disc (2), the protective film (4) facing one outer edge of the rigid disc at least in certain sections (E) springs back, and with at least one on the edge of the rigid disc (2) in the region of or the recesses of the protective film (4) arranged holding element (5), characterized in that the holding element ( 5) has an approximately, but preferably at most the thickness of the adhesive layer (3) at the edge of the protective film corresponding thickness and at least in defined sections of the protective film (4) is partially covered.

Description

The The invention relates to a composite disk with an integrated Holding member.

Under Composite disk here are multi-layered structures of at least a rigid disc and one with this surface-adhesive Connected adhesive layer or film understood. The generally transparent or translucent rigid disc can made of glass or plastic. It can too other rigid disks by means of adhesive layers or films with being connected to the rigid disc, being in one and the same Composite disc also combines rigid discs made of glass and plastic could be.

It are already many embodiments of such composite discs known. They have as a fundamental common goal a high security of their attachment in the respective window opening. This not only applies to normal window panes in vehicles and buildings, but also for bulletproof glass for special protection purposes, which is increasingly used become.

In As a rule, you can see holding elements in front, those on the outside Edge of the rigid discs are provided and the free field of view restrict the disc as little as possible. The holding elements can be used as discrete components, as strips or as running around the frame, the latter Case the highest security is achieved and also one continuous coverage of one between the outer edge the composite disc and the frame formed gap created becomes.

It There are also various types of composite discs with integrated Holding elements that are rigid in the plane of an adhesive layer between two Slices are embedded and over the outer Edge of the rigid discs protrude.

Often these holding elements are as extruded onto the composite pane or molding molded or glued profile strands or sections executed. You can in turn further fasteners for the disc included.

In Some applications are mechanical on glass low load functional layers or functional elements (thermal barrier coatings, Luminescent layers, solar cells) applied, which are against contact and must be protected against scratches. For this you can, for example, with highly transparent adhesive layers a also transparent protective film on the protected Laminate surfaces.

In still other applications, the (protective) film itself may be a carrier of functional layers, or at least form part of such a possibly multi-layered carrier. To such a laminated or laminated film, the splinter bonding function is added in addition to its optical, electrical and / or thermal insulating function. Examples of films with functional layers are: illumination (LED, OLED, electroluminescence, ...), the transmission-changing layers on a film substrate (electrochromic, thermochromic, photochromic, ...) or layers with switchable light transmission (liquid crystal elements - LCD , Priva-Lite ^® type products ( www.privalite.com ), Suspended Particle Devices (SPD), ...) as well as films with infrared rays reflecting layers.

Such Protective films are also available in so-called anti-shatter protection films known or can be used as such. They will in particular mounted in vehicles on the surface of a windowpane, which faces the passenger compartment. The goal of these slides is, at a possible breakage of the disc, the penetration of splinters in the passenger compartment, as well as the direct contact of persons with sharp edges caused by the break.

Plastic films The types mentioned above are usually scratch-proofed Coating (eg of polysiloxane) provided to its surface long-term to obtain a high optical quality.

For Vehicles are in particular monolithic roof glass panes equipped with such protective films as composite discs with two rigid panes and adhesive layer in the roof area not always used can be. Apart from that, the conventional To make compound disks thicker, heavier and more complex.

One A well-known example of protective films is the commercial one available laminate system from DUPONT with the product name "Spallshield". It exists z. B. from a thermoplastic adhesive film (polyvinyl butyral - PVB) the thickness 0.76 mm and a scratch-resistant coated film made of PET (Polyethylene terephthalate). The adhesive film is directly on a Surface of the rigid disc laminated and holds so that the PET film as the actual splinter protection surface-adhesive on the disk surface.

Should such a disc can be glued directly to a body or with an adhesive plastic profile (edge seal, mounting profile) However, so can the said scratch-resistant coating lead to liability problems.

DE 103 55 896 A1 describes a composite pane with a laminated on glass and cut back edge film in which the latter is only partially coated with the film to improve the adhesion of a mounting adhesive on the glass surface on the glass surface.

DE 102 06 717 A1 also describes a relevant composite disc with protective film, in which the latter itself is designed as a mechanical additional holding element.

Of the Invention is based on the object, a composite disc with increased To provide mounting security.

These Task is according to the invention with the features of the protection claim 1 solved. The features of the subclaims indicate advantageous developments of this invention.

With a holding element in the intimate positive and cohesive Connection is disposed under the edge of the protective film and on the other side is a backup function for the claim created. The holding element forms even in the event of destruction the (tempered) glass together with the protective film Randanbindung and Auffangenbene, with the at least the fixed with associated protective film and thus adhering to her broken glass securely held to a frame or substructure. At the same time, the holding element forms an additional planar Securing and catching level against the falling off of broken glass passing the edge of the protective film, especially if the composite disc is installed in a roof or ceiling area.

at the same time The holding element forms a solid and reliable basis for fasteners attached to the composite pane itself must be attached. Due to its small thickness contributes it does not strong or not on, so the protective film also in her Edge region is practically parallel to the disk surface. By further measures can also the optical perception of the retaining element through the film and / or the glass pane is reduced become. Overall, optical impairments (in Reflection image and in the review) due to the integrated Holding element largely avoided or avoidable.

Of course the retaining element can consist of a plurality of elements, lying against each other or with defined distances can be arranged to each other. It is in any case Made of a material that has an intimate mechanical connection with the material of the adhesive layer and / or other adhesive materials and in particular with one or more at the edge of the composite pane allows to be provided fasteners. This can z. As a fabric or a knit be.

To the Introducing the retaining element under the edge region of the protective film you can provide the adhesive layer with corresponding recesses, during the production of the composite between the Protective film and the glass filled with adhesive become. However, the retaining element is flat enough and has a sufficient Absorptive capacity, so you can even without such a recess the adhesive layer work and so the retaining element in the existing Practically embed adhesive layer.

When Fasteners are preferably, but not exclusively, Profilstränge of plastic proposed to the Edge of the composite disc directly molded (by injection or extrusion) or glued (in prefabricated profile sections) can be. Of course, but also mechanically clamped fasteners from the support member benefit.

If the protective film at the same time as a function carrier for Coatings or functional elements of the aforementioned Kind serves, so the compound disk is of course with electrical External connections for electrically controllable or equip switchable functional elements, so that these to a Power source or a switching or control device connected can be.

With This embodiment is an alternative to the well-known Laminated discs made of at least two rigid discs and adhesive layer, which at least achieves their resistance to breakage.

Further Details and advantages of the subject invention go out the drawing of an embodiment and its in the following subsequent detailed description.

It show in a simplified, not to scale representation

1 a schematic perspective partial view of a composite pane according to the invention;

2 a plan view of an edge region of the composite pane after 1 ;

3 another plan view accordingly 2 after another production step;

4 a sectional view of a first embodiment of the composite pane;

5 a sectional view of a second embodiment variant;

6 a sectional view of a third embodiment variant;

7 a sectional view of a fourth embodiment.

According to 1 comprises a composite pane shown here in perspective in the cutout 1 a rigid glass pane 2 , on the surface of an adhesive layer 3 liable. With the latter is a protective film 4 also flat adhering to the glass 2 laminated, leaving the protective film 4 an outer surface of the composite pane 1 forms.

It should be noted that the composite disk 1 Although shown and described here as a flat product, cylindrical or slightly spherical disks can also be equipped and executed in the same way. In all figures are only cutouts from the composite disc 1 shown because in the present invention, only the edge region is affected by measures according to the invention.

The Although shown edge portions are representative of the entire outer circumference of the composite disc. This concludes but do not rule out that it's different than shown sections can give the edge region, without the invention Leave frame.

The protective film 4 and the adhesive layer 3 can be formulated as a prelaminate, for example in the form of the already mentioned DuPont product. This can be a PET or PVC film (TEDLAR) of a few tenths of a millimeter thickness and a PVB film with the usual thicknesses of 0.38 or 0.76 mm thickness. Of course, other sufficiently transparent adhesive layers (eg of polyurethane or ethylene vinyl acetate EVA) and other tear-resistant protective and / or functional films can be used.

If the glass pane 2 consists of toughened glass, which shatters in a variety of blunt-edged fragments at a violation of the compressive stress zone holds in the event of breakage, the protective film together with adhesive layer these fragments still together. However, it is crucial for the flat integrity of such usable as a window or roof glass pane that at least the protective and / or functional film is held even with high strength to a frame construction, a mounting flange or the like. The invention is particularly directed to this.

At the in 1 right visible outer edge of the composite pane 1 leaves the protective film 4 an edge strip E free. For this purpose, it can be cut smaller than the surface of the glass pane when cutting 2 cut out, cut back on the outer edge after laminating or otherwise removed. In general, the edge strip E is over the entire outer circumference of the composite disk 1 extend. But it is also possible only on certain sections, eg. B. in window corners and / or at certain points of the side edges to release such edge strips.

Vehicle windows are covered in the region of the edge strip E usually with an opaque (usually printed and baked, also called black print) color layer, which is not shown here (see, however 2 et seq.). The width of this paint application can vary greatly depending on the subsequent installation environment; the same applies in principle to the width of the edge strip E itself or of the corresponding cutback or return of the edge of the protective film 4 opposite the glass pane outer edge.

The edge strip E covers a serving as a holding element band 5 of a fabric material, for example, fiberglass mat, high performance fibers, etc. The same tape 5 also extends a certain amount (a few millimeters to centimeters) sandwiched under the protective film 4 , so that parallel to the edge strip a coverage area between the protective film 4 and the band 5 is formed. Although the protective film 4 is optically transparent, you can see the holding element or band 5 in the coverage area not or only weakly.

The ribbon 5 So it forms one of the protective film 4 Partially covered reinforcing and holding element, the adhesive by a suitable treatment process and intimately with the glass 2 , the adhesive layer 3 and the protective film 4 connected is. Overall, a high-strength mechanical connection between the band 5 on the one hand and the disc 1 as well as the protective film 4 reached. The band is preferred 5 have a net-like structure, with free spaces that are sufficiently large to ensure intimate penetration of the tape with liquid or viscous adhesives.

However, the term "tape" does not exclude other possibilities to form such flat holding elements designed according to the invention and integrated into the composite pane. It could, for example, discrete sections are provided, the next to each other or with pre give mutual distances along the edge of the composite disc 1 to be ordered. If only the band is mentioned below, such exchangeable options are not excluded in any way. It is essential that the material of the tape or other holding element with the adhesive layer 3 and with the surface of the glass pane or with the underside of the protective film 4 a high-strength adhesive bond can enter or by adhesives it can be securely attached. It would also be possible, for example, to introduce perforated strips of a solid material here or to lay partially under the protective film.

The attachment of the band 5 itself can be done in several different ways. You can z. B. coat the tape with an additional adhesive and before placing the adhesive layer 3 along with splinter protection film 4 on the disc 2 provisionally fix. Such a solution is particularly useful when the tape itself is not very thick or can be pressed flat.

Alternatively, a thermal fixation of the tissue on a PVB basis or a solvent-based fixation is possible. It is also possible during the melting of the thermoplastic adhesive layer 3 with suitable means (eg targeted vacuum action) to ensure that it floats the tape equally and combines after solidification with this positive and positive high strength.

The edge strip E is used in any case, regardless of the protective film 4 and their - not visible in the drawing - scratch-resistant coating fasteners reliably connect to the glass pane surface. Through the pruning of the splinter protection film 4 In this edge area it is avoided that the scratch-resistant coating of the splinter protection film 4 the adhesion of assembly adhesives, edge profiles or the like is impaired.

Using the fasteners is the composite disc 1 connected to the frame of a window opening. The ribbon 5 serves as the basis for the adhesive attachment of such fasteners (profile strands or sections, fittings, straps, etc.).

2 and 3 show a comparison of two stages of the production of composite discs according to the invention. It can be clearly seen in these plan views the return E of the protective film 4 opposite the outer edge of the glass sheet (shown below) 2 ,

The protective film 4 is shown in its outer edge region semitransparent, so as to the arrangement of the relatively coarse-meshed band 5 and the clearly recognizable opaque color band 6 below the foil 4 to clarify. The color stripe 6 covers the edge strip E. Its width preferably corresponds to the width of the band 5 so that this from the outside (from the back through the glass 2 through) is not visible bar. The main optical purposes (lamination, coverage against light and in particular UV rays) serving color strip can basically on one of the two surface sides of the glass 2 , ie inside or outside, or be arranged on both sides of the surface.

in the Installed state in a vehicle is the protective film to the passenger compartment The glass surface is exposed to the outside.

You can clearly see the partial coverage of the band 5 through the edge of the protective film 4 , The ribbon 5 extends along the outer edge of the glass sheet 2 , It can in principle be flush with the said edge, or also spring back towards it (but less so than the protective film 4 ), or - depending on the mounting environment - also protrude beyond the outer edge.

In the stage according to 3 is a section of a fastener 7 (here in the form of one on the disk surface in the edge strip 3 adhesive profile strand) has been added. Visibly covers this fastener 7 the ribbon 5 in the from the protective film 4 released edge strip E. It bumps directly against the edge of the protective film 4 , It is intimately adhesive with both the band 5 itself as well as under penetration of the tape with the surface of the glass sheet 2 or with the black print on it 6 connected.

While in 3 and 4 to clarify the coverage of protective film 4 and holding element or band 5 the latter through the protective film 4 It is also possible to make the protective film opaque, or at least less transparent, even in this edge region. This can be done, for example, by zone-wise dotting or coloring of the film material itself, or also by applying an opaque color strip.

4 shows a cross section through the edge region of the composite pane 1 along the line IV-IV in 3 , One recognizes here even better that the fastener 7 with the tape 5 is intimately connected in the region of the edge strip E and is as wide as the edge strip E itself. It can also be seen clearly that the protective film 4 in its border area the band 5 covered, the latter essentially directly on the top of the glass 2 or the (here on the inner or foil side of the composite disc printed) color rendition fens 6 rests.

The color stripe 6 conceals this area from view through the glass pane 2 therethrough. He is slightly wider than the band 5 , It also protects the area of adhesion of the fastener 7 from UV radiation, which according to experience can lead to embrittlement and detachment of the plastic material.

In an in 5 variant shown covers the fastener 7 in otherwise opposite 4 unchanged configuration mainly for optical reasons, the edge of the protective film 4 to a small extent (millimeter range). It is thus in this variant slightly wider than the actual edge region E, or as the return of the outer edge of the protective film 4 opposite the outer edge of the glass pane 2 ,

It is understood that the fastener in turn is not flush with the outer edge of the glass 2 must complete, but also protrude beyond this and may also be present on the front edge of the glass pane (edge protection and / or gap cover function). Depending on the design interpretation, such a fastener may also be the outer surface of the glass 2 cover a short distance, leaving the entire edge of the glass 2 in the fastener 7 is embedded.

In the in 6 variant shown was the band 5 at least in the area of overlap with the protective film 4 with a thin adhesive layer 3 ' underlying, that is between the color stripe 6 and the band 5 is arranged. The two adhesive layers 3 and 3 ' grasp the retaining element 5 in the area of its coverage with the protective film 4 between themselves. This allows an even better adhesion and connection between the tape 5 and the protective film 4 be created. Also, the liability of the fastener 7 can thus be further improved. However, it is a slightly higher production cost to operate.

Not shown are options for defining the band 5 on the surface of the color strip 6 or the glass pane 2 in the area E. Again, you can do a preliminary or final gluing of the tape 5 or analogous holding elements, if one does not rely solely on the ability of the material of the fastener 7 leave to penetrate the tape material and in turn directly on the color strip 6 or to adhere to the glass material. Generally you can in all versions of the color strips 6 or - should this not be provided - the edge region E of the glass 2 provided with an adhesion promoter / primer, which ensures the adhesion between an adhesive and the substrate for a long time.

While in the figures discussed so far the band 5 is shown and executed as a surface-mounted component, it is in the in 7 shown variant with an additional loop or fold 5P executed. This is outside of the protective film 4 covered area, ie in the edge strip E.

In case of damage to the tempered glass pane 2 are known to temporarily expansive forces in the plane of the disc free. The disc "grows" slightly beyond its original outer contour. The associated relative expansion can be constructive with the fold 5P be encountered, as this is a yielding or stretching of the tape 5 allows in itself and forms a kind of capture zone, which allows a slight degree of compliance of the band also perpendicular to the disc plane. The ribbon 5 or its already mentioned functional equivalents thus form a kind of safety net or catching plane for the damaged glass pane. An arrangement of the fold appears advantageous 5P in the joint area between the edge of the protective film 4 and the facing edge of the fastener 7 so that the fold 5P can unfold in case of failure, without adhesive or by the fastener 7 to be prevented from doing so.

Deviating from the illustration in 7 can the fold 5P also be flattened. For this purpose, the two folding layers below the fastener 7 based on the on the disc 2 resting part of Bandes 5 rest. In this case, make sure that for the fastener 7 still a sufficiently broad liability base on the unfolded part of the band 5 remains. Also in this case will be the crease 5P at a high load (breakage of the glass pane 2 ) partially stretch and thus perform their task-appropriate stretching and holding function.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10355896 A1 [0014]
• DE 10206717 A1 [0015]

Cited non-patent literature

• - www.privalite.com [0008]

Claims (19)

Composite disc ( 1 ) with at least one rigid disc ( 2 ) and an adhesively bonded adhesive layer ( 3 ), with a protective film ( 4 ) on the rigid disc ( 2 ) is laminated, with the protective film ( 4 ) against an outer edge of the rigid disc at least in certain sections (E) springs back, and with at least one at the edge of the rigid disc ( 2 ) in the region of or the recesses of the protective film ( 4 ) arranged holding element ( 5 ), characterized in that the retaining element ( 5 ) an approximately, but preferably at most the thickness of the adhesive layer ( 3 ) has at the edge of the protective film corresponding thickness and at least in defined sections of the protective film ( 4 ) is partially covered. Composite pane according to claim 1, characterized in that the holding element ( 5 ) band-like around the entire circumference of the composite disc ( 1 ) and everywhere on a part of its width of the protective film ( 4 ) is covered. Composite pane according to claim 1, characterized in that the holding element is composed of a plurality of originally loose sections, which lie close to each other or with defined distances in the edge region of the composite pane ( 1 ) are arranged and fixed. Composite pane according to one of the preceding claims, characterized in that the holding element from a one penetration with a flowable or viscous adhesive material permitting material. Composite pane according to claim 4, characterized in that the holding element ( 5 ) consists of a material provided with recesses or apertures or with a surface roughness or of a woven or knitted material. Composite pane according to one of the preceding claims, characterized in that the adhesive layer ( 3 ) at least locally opposite the outer edge of the protective film ( 4 ) springs back to form a supernatant, and that the retaining element ( 5 ) at least in the region of this exposed supernatant with the composite disc ( 1 ) is firmly connected. Composite pane according to one of the preceding claims, characterized in that the holding element ( 5 ) in the region of the covering with the protective film ( 4 ) between two adhesive layers ( 3 . 3 ' ) is enclosed. Composite pane according to one of the preceding claims, characterized in that on the basis of a surface area of the holding element not covered by the protective film ( 5 ) a fastener ( 7 ) and under connection with the holding element ( 5 ) on the composite disk ( 1 ) is attached. Composite pane according to claim 8, characterized in that the fastening element ( 7 ) is a profile strand of plastic, which at the edge of the composite disc ( 1 ) is directly molded or glued. Composite pane according to claim 8 or 9, characterized in that the fastening element ( 7 ) the recessed edge of the protective film ( 4 ) covered. Composite pane according to one of claims 8 to 10, characterized in that the fastening element ( 7 ) over the edge strip (E) left free by the protective film and over the outer edge of the pane ( 2 ) extends outwards. Composite pane according to one of the preceding claims, characterized in that the holding element ( 5 ) at least one loop or fold ( 5P ) as a stretching option. Composite pane according to claim 12, characterized in that the fold ( 5P ) in the region between the edge of the protective film and a fastening element ( 7 ) is arranged. Composite pane according to claim 12, characterized in that the fold ( 5P ) under a portion of the attached on the edge strip fastener ( 7 ) is arranged. Composite pane according to one of the preceding claims, characterized in that the holding element ( 5 ) and a fixedly connected to the disk on the base fastener comprise the disc as a closed frame. Composite pane according to one of the preceding claims, characterized in that the glass pane in the region of the support of the holding element ( 5 ) for optical lamination has a reduced transparency, in particular is covered with an opaque color strip. Composite pane according to one of the preceding claims, characterized in that the protective film ( 4 ) in the region of the overlap with the holding element ( 5 ) for optical lamination has a reduced transparency, in particular is covered with an opaque color strip. Composite pane according to one of the preceding claims, characterized in that the protective film ( 4 ) at the same time forms a carrier or a part of a multilayer carrier for functional layers. Composite pane according to claim 18 with external connections for connecting electrical functional elements to a power source and / or control device.